Personally I would reccomend an Epson all in one printer. The ink a little bit pricer and it comes in cmyk cratridges. And you'll have to not forget to print something now and then to avoid the ink from clogging.

But with the right paper they can make some very nice prints. If your biggest concern is scanning then i dont think it makes much of a difference how expensivr you get. I mean you dont want a rubbish scanner but from my experience most scanners are the same and you'll almost always have to photoshop, gimp, whatever and have to touch your scans for cleanup, color correction, or slight warping.
Anothet consideration is how big of scanner you want. If youre always drawing larger than printer paper consider that.

Currently i have a consumer level canon inkjet printer with scanner on top and it still does the job for me

Any scanner is good, you just have to edit the picture a little after you scan it.