Something important to consider is, do you want to take advantage of autotraining? If you don't, then Highlander is the best race, no question (and you should spec into Slash). If you want to consider AT, making a Saracen becomes a good option for group RvR because you can get the 50 Instruments/44 Thrust spec by AT'ing to at least level 36. But, like Raifs said, maximizing your character's survivability is probably your greatest concern, so high Con is very important.

If you like the look of a Briton, their stats are a decent middle ground, but they suffer having a worse racial resist for group RvR (Matter) than Saracens (Heat), or Highlanders (Cold). Regardless of all that, you really won't handicap yourself by picking "the wrong" race, so pick whatever is your preference. This advice is solely for the devout min/maxer

I d go saracen for better demezz and 5% heat resi
also more sneaky

Aelred wrote:If you like the look of a Briton, their stats are a decent middle ground, but they suffer having a worse racial resist for group RvR (Matter) than Saracens (Heat), or Highlanders (Cold).

Britons have 5% spirit.