I think the Stripper, Pro, and WT come with brakes/levers... also the Pro and WT have some upgraded parts, cranks, rims, etc... (in black if it suits you). As far as the size, do the hardback book shoved as far up in the crotch as you can... back against a wall and measure (as if its your bike seat), to get an accurate "cycling" inseam. See if it gets you closer to a sizing decision. Compare it to the standover to make sure you don't get a frame that is to big at least. Give yourself an inch or so... maybe more since it has a long stem on it that will stretch you out a bit over the bars.

47cm (c-c) is 50cm(c-t) with TT of 513mm and standover of 29 inches
50cm (c-c) is 53cm(c-t) with TT of 523mm and standover of 30 inches
53cm (c-c) is 56cm(c-t) with TT of 548mm and standover of 31 inches
55cm (c-c) is 58cm(c-t) with TT of 570mm and standover of 31.7 inches
57cm (c-c) is 60cm(c-t) with TT of 575mm and standover of 33 inches
60cm (c-c) is 63cm(c-t) with TT of 606mm and standover of 34 inches

from: http://bikesdirect.com/products/merc...t_stripper.htm

Or you can use some of them fancy sizing measurement/calculators out on the web...

Tools... chainwhip, lockring spanner, multi tool, tire levers, patch kit, pump... you'll need to keep the wheels, cog, and pedals on tight, make adjustments, and fix flats.

Accessories... sturdy lock, bottle cage, water bottle, baggage (wedge, backpack, messenger bag), lights, fenders, etc...

Hmm... what did I miss?