I’d disagree that the aluminium Transmitter is particularly sluggish. It’s not the lightest bike out there for sure, and it’s more stable and reliable steering than flickable, but with a faster-rolling rear tyre it motors along quite happily. Obviously that’s all relative, but with a Minion DHF front and a Rekon out back, it feels fine to me. Also the tyres roll really well on small to medium bumpy stuff. With a Trailblazer out back it flew, but didn’t have a lot of grip.
I’ve ridden the carbon version as well and it’s appreciably lighter, which makes it feel a little livelier. Depends how it’s built I guess. I’ve not ridden a stock build aluminium Transmitter, though a few people have said that the wheels aren’t the lightest. If you can afford to stretch to the carbon, it’s really nice.
Good people to deal with. Alpkit’s been selling outoor gear for more than a decade now I think and has a really good reputation. They do test rides from their shops or you can get one shipped to you for a weekend at a price.