It really depends on how coarse your beard hair is in all honesty. If you have really thick/tough hair you going to want to get a higher end Braun, but if you have light hair even a Wahl will work fine.
As a side note I stopped using an electric razor (still own a Norelco when I want to be lazy and it's compact one to just hit my neck), but use a straight edge blade now. Awesome investment and the best shave ever if you ever want to go that route!
But i own a Braun Series 9-9095cc and it's worked really well for me when I have used it (got it has a gift). I got thick hair so it gives me a very clean shave for an electric. It's like $250-$300. But I still prefer the straight edge lol.