I'd avoid the Tacwise ones, personally. I had the cordless one ('Ranger'?) and it was truly terrible - and huge; easily as big as a Paslode, and not much lighter. I have a corded Tacwise that I use as a stapler, and it's OK - but no better than OK.
I finally gave in and picked up the Spotnails version of the Maestri 21-gauge veneer pinner (does 15-30mm pins, the Maestri only does 20mm I think) and have been very happy with it. Not cheap, but far, far more reliable than the Tacwise and Rapesco pinners, as you'd expect for the money; I think I paid £170-ish a couple of years ago for mine. The only slight niggle is that it comes with a stupidly short mains lead, but that's easily changed.
HTH, Pete.