the DA is not a small mouse i'm sorry but relative size doesn't matter. claw != fingertip grip.

Will the mx518 have any issues on the Goliathus?

Nope.

I like the Corsair M60/65 personally, one of the best mice I've ever used with Corsair quality on top to boot.

Do your homework, a lot of the mice in this thread have issues with prediction and acceleration. I've considered most of these mice at some point and the only ones I found working properly were Abyssus, Deathadder, G400, AM and possibly WMO/IE3.0. Abyssus jitters on many surfaces but it acceptable at 450dpi and low sensitivity, wonderful shape and very light. G400 is sturdy with a well performing sensor but is too heavy. WMO has slight negative acceration, even with custom drivers and a polling rate of 500hz.

I use a semi-claw type hold on my mouse, so the DA is a normally good fit for me but not perfect. However the Zowie EC1 and EC2 are the same shape only a bit better and ome in 2 sizes, EC1 = large, the same size as the DA only not as thin where your pinky and thumb grip so ti's even better. EC2 is a bit smaller overall but same great shape.

So right now I think the top mice are from Zowie:
Zowie AM - great for lefties
Zowie EC1 and EC2 evo - my winner and using right now (black = soft felt, white = glossy like old DA)

IF you like the shape, the G400 is also pretty flawless.

Mice to avoid imo are:
I've tried;
-G400 (no where to put my ring finger, poor design for 2 finger button user)
-CM Spawn (Best form fit on any mouse ever but has CPU lock down issue in Windos 7 64 and mumble)
-CM Xornet (same great form as spawn but super bad negative accel)
-G9x (Hate laser sensors)
-Abyssus (WAY too small, will jitter on some pads)
-G500 (both form factor and sensor issue)

"Buy a touch screen monitor and never miss a shot."

-Invite CS player