Re: RG655 vs Kiesel Aries
Peronally, I'd go with the Ibanez.
Prior to the name change, Carvin had a reputation for making consistently decent semi-customs and giving you a lot of options, but not being especially toneful and often tending to be kind of bright and not all that resonant. I've played a bunch of them, and one or two were phenominal but most of the rest were average - fine, decent value for the money, but nothing special.
Post name change, Kiesel has erred on the side of flash over quality. The "Kiesel edition" ones are often tacky as hell, and while they've expanded the number of models and options they've produced, quality control has slipped. Customer service has slipped a little too - I understand their policy of not letting people return "Option 50" guitars, or guitars with one-off features not one of their usual options, but I've seen instances where people have ordered an option 50, had that particular feature come out different than they'd ordered, and then still not been able to return it even though there was a clear Kiesel error. I've heard a lot more QC problem stories post the name change than I ever did under Carvin, and pricing has increased, as well.
A 655 is basically the old RG550/570 with Prestige branding, and a 550/570 is an absolute staple guitar. Throw an upgraded set of pickups in there and it's a great all around shred/metal/rock guitar with a surprising amount of versatility.
Though, +1 on "if you want a Suhr, just get a Suhr." My main player is a Modern 7, and it's a spectacular guitar.