Whichever you buy, go for at least a 30". While a 24" is adequate, with a 30" things seem to lay out better on the media. When I had a 24" I was always trying, with varying degrees of success, to shoehorn images onto the media. With the 30" I can't recall the last time it was an issue.
We started with a 24", not knowing 24" meant "it won't cut 24" ". We did the 30" Graphtec and size wise, it's been excellent. Being able to actually mark patterns that are 24" has been a real blessing. I haven't cut much stuff in the 24" range, but I have used it for patterns for dimensional letters many times. LOVE LOVE LOVE the 30" machine.
As far as support? It would be non-existent for us. We bought it from a big name company (that may or may not be a merchant member here), and we've had cutting issues with it after about 2-3 months. It cuts inconsistent. If you cut the same line of text, all the way across a sheet, maybe 5 of them, 3 will weed like magic, 2 will be a pain in the a**. Called graphtec and they said it was the material. We've tried Oracal, Avery, Trim, Arlon, and maybe another couple. Does the same on all of them.
Called the dealer. Dealer tech support said "Call Graphtec". So we started buying all of our material and cutters from the same place we bought the machine. So now we call in, when they say "It's the material, we say 'We bought the material from you' ". They have come into our shop, run dozens of samples, and left saying "there's something wrong with that machine".
And still, it sits here, unfixed, no phone calls, no nothing. No sense in calling Graphtec, they'll just tell me "it's not a machine problem" again, like they have every single time I have called.
So now, we just fight with the machine, hoping it'll wear out sooner rather than later and we can buy something else from a different dealer that actually gives a crap.
It cuts, it works, it's just a bear to weed jobs. If you look at the release liner, you can see where it cuts through in some places and not in others. New cutters, brand new cut strip, etc. It appears to be a mystery to everyone involved.
It won't be a mystery when we buy their competitors machine.