I have an early 2011 MBPro 15", 2.3 GHz i7, 8 GB RAM, 512 GB SSD, and comparing my scores to those of the new models:
15-inch MacBook Pro:
- My 15" MBPro, 2011 : Single-Core 2810, Multi-Core 10405
- i7-4750HQ @ 2.0 GHz: Single-Core 2844, Multi-Core 10887
- i7-4850HQ @ 2.3 GHz: Single-Core 3100, Multi-Core 11771
- i7-4960HQ @ 2.6 GHz: Single-Core 3379, Multi-Core 12813
Frankly the fact that I can still drop an upgraded hard disk in there any time I want (instead of being locked-down to the disk (and RAM) sizes when I but the Mac from Apple,) means I'll be sticking with my current Mac for a while.