1. Thanny. If 'cos i just love it' is not reason enough, then what about dual lgauss and erll, added to JJs, a nice speed even with only 1 ton extra, excellent armor (imo). 360 torso however is the icing on the cake for the thanny, and why it is so much better than the BK. I'd gladly give up an extra erll (which you can fit on BK) for my 360 torso so thanny is top of the pile for me.
I love JJs btw

2. Cougar. Less than half the weight of a madcat, but double the speed and 3 erll is a lethal combination. And yet again, the good old JJs. I would much rather go in a 1 on 1 fight with cougars than with madcats. But i still love my madcat....
3. Madca.... whaddya mean you already guessed??? Seriously, in the hands of a really good pilot, i have seen this mech scoring 17-0 in open servers. Okay so it is a pure laserboat when it is at its strongest (you have msle option and 2 omnis as well tho) and so is much frowned upon. Having said that, i'd rather go in to a fight with madcats covering my ass than, say, buffs like the daisy

Glas