As everyone else has said the america and speedy are essentially the same so the choice there is a personal one. While I've not seen the Kwaka 900, a friend of mine purchased a kwaka 800 vulcan (basically the same bike you're looking at) about 12 months after I bought my america (despite my attempts to change his mind). I've had my nose stuck into his bike when I installed an alarm, and have ridden it several times.
It's a nice enough bike to ride, nothing stuck out as being particularly bad, then again nothing stuck out as being particularly good either. It's got more low-end torque than the 790cc america, tho the newer 865 engine probably fixes that. However when I started pulling it apart to put the alarm in it became obvious that it wasn't as well built as the triumphs. The plastic bodywork is thinner and flimsier, nothing fits together quite as well, and electrically I'd call it sub-standard with minimum gauge wires, none of the waterproofing grease on the electrical connectors that the triumphs have, and design oddities like having to completely remove the battery (which is buried beneath the seat) to change a fuse. Overall I'd say the small price difference is simply the price for quality.
If you're interested in catching the admiring gaze of others, forget the kwaka. His bike was less than 24 hours old and mine was a year old and I rode into the city centre with him so he could take it for a spin. We parked the bikes and went for coffee. Upon returning to the bikes we had 3 separate people come and admire my bike and despite my attempts to divert them to his brand new machine (to sooth his wounded ego) they all wanted to talk about my Triumph, rather than his japanese, rice-burner, V-twin clone.
