I would suggest you stay where you are if you seat in row one you are near the wardrobe and sometimes you can get disturbed by FA's and other passengers.
My GF and I are travelling from SFO to LHR in F and we have 2k and 3k (we both like window seats) we think we have good seats!
Its up to you but I would stay where you are. If in doubt check out
www.seatguru.com