I've flown the CT2K, and had a good look at the CTSW.
The performance figures seem about right, *but* be aware of the payload - you'll get that range 1-up, but unless you and your passenger are very light, you're not going to get more than a couple of hours fuel on board 2-up.
Expect a total payload of about 185kg, including fuel for a UK version CT2K or CTSW.
Handling and performance are sparkling, the electric flaps and LCD instrument panel take a bit of getting used to but work. There's not really spare weight to fit much in the way of navaids and you can't legally fly one night/IMC.
G