I'm in the process of writing Unnatural Swarms, and I'm torn as to how to present it.  I can't settle on a monster stat block format to showcase each set of stats.  I have three options open to me, and I'm willing to hear more.

To start off, I hereby present the Bullet Bug swarm.  Here's the general info and abilities, which are the same regardless of the stat block.

Bullet Bug Swarm
Bullet Bugs resemble a horde of hollow-point bullets, each with eight legs and two antennae. Their chittering resembles the sound of firearms being cocked and loaded.  The wounds left by their burrowing are indistinguishable from gunshot wounds; many of their victims may have been passed off as mundane homicides.

Vermin: A bullet bug swarm is immune to mind-affecting attacks.

Burrow (Ex):  Rather than automatically dealing damage like a regular swarm, bullet bugs only deal damage if they manage to successfully burrow into the bodies of their victims.  Every creature in the same area as the bullet bug swarm must make a Reflex save (DC 15) to prevent any bugs from being able to burrow.  On a failed save, one bug manages to burrow inside the creature, inflicting 1d3 points of Constitution damage each round.  This effect is cumulative; every time the creature fails a Reflex save, the Constitution damage per round increased by 1d3.  This damage continues even if the creature leaves the area occupied by the swarm; it can only be halted by surgically removing the bullet bugs, requiring a Surgery check (DC 15) for each burrowed bullet bug.

Resistance to Massive Damage (Ex): A bullet bug swarm gains a +5 species bonus on Fortitude saves to negate the effects of massive damage.

Darkvision (Ex): A bullet bug swarm can see in the dark up to 60 feet. Darkvision is black and white only, but it is otherwise like normal sight, and the bugs can function with no light at all.

And now, the statblocks:

Quote from: Standard Compressed BlockBullet Bug Swarm: CR 5; Medium vermin (swarm of Fine vermin); HD 4d8; hp 18; Mas 10; Init +3; Spd 20 ft., climb 10 ft.; Defense 13, touch 13, flat-footed 10 (+3 Dex); BAB +3; Grap —; Atk swarm (burrow); Full Atk swarm (burrow); FS 5 ft. by 5 ft.; Reach 0 ft.; SQ swarm, vermin, distraction, burrow, resistance to massive damage, darkvision 60 ft.; AL none; SV Fort +4, Ref +4, Will +1; AP 0; Rep +0; Str 1, Dex 16, Con 10, Int —, Wis 10, Cha 2.
Skills: Climb +3, Spot +5.
Feats: None.
Advancement: None.

Quote from: Old WotC Monster Format (as seen in Monster Manual)Bullet Bug Swarm
Medium vermin (swarm of Fine vermin)
Hit Dice: 4d8 (18)
Initiative: +3
Speed: 20ft.
Defense: 13, touch 13, flat-footed 10 (+3 Dex)
Massive Damage Threshold: 10
Base Attack/Grapple: +3/--
Attack: swarm (burrow)
Full Attack:  swarm (burrow)
Space/Reach: 5ft. by 5ft.
Special Qualities: Swarm, vermin, distraction, burrow, resistance to massive damage, darkvision 60ft.
Saves: Fort +4, Ref +4, Will +1
Abilities: Str 1, Dex 16, Con 10, Int --, Wis 10, Cha 2
Skills: Climb +3, Spot +5
Feats: None.
Environment: Urban.
Organization: None.
Challenge Rating: 5
Allegiance: None
Advancement: None.
Level Adjustment: None.

Quote from: New WotC Statblock (as seen in the DMGII and Dragon)Bullet Bug Swarm (CR 5)
Medium vermin (swarm of Fine vermin)
Init +3.  Senses: Darvision 60ft., Spot +5

Defense 13, touch 13, flat-footed 10 (+3 Dex)
hp 18 (4 HD) Mas 10
Fort +4, Ref +4, Will +1

Speed 20ft.
Melee swarm (burrow)
Base Atk +3; Grp --

Abilities Str 1, Dex 16, Con 10, Int --, Wis 10, Cha 2
SQ Swarm, vermin, distraction, burrow, resistance to massive damage, darkvision 60ft.
Feats None.
Skills Climb +3, Spot +5
Allegiances None.

So, which of these three do you prefer?  Or do you have another format that looks/reads much nicer than any of these?

i prefer the middle, but that's probably just because i've spent so much time using it.

The last one is cleanest and easiest to read for me.

to me it looks disjointed, but then see my previous post.  

It is disjointed; I think it's intentional for better organization and reading in combat.

I've decided to go with #3, based on feedback here and from another messageboard.  It's organized with a recognizable logic, and I can split the four sections into a 2x2 arrangement to fit better on a page.