Join Date: Dec 2000
Location: Philadelphia, PA
If you can get a RG7620, that would be the suggested route by most on this forum. DiMarzio pickups, LoPro trem are desired features.
The RG7420 is better than many give them credit for. The V8 and V7 pickups, are better than many stock pickups on the market. It also has the much maligned LoTRS trem (not a TRS2, big difference). The trem, if maintained properly will provide excellent stability and reliability.
The GRX720 is strictly entry level. Non-locking trem, 22 frets (as opposed to 24 on the RGs), and somewhat weak pickups. If you must have a seven string and are short on funds, this will work.