Here's another vote in favour of Raluka. I saw her earlier in the year based on the positive comments from other members on this site, and she didn't disappoint. A lovely, easy-going girl.
Other well-rated WGs in Southampton are Lana Lust, but her availability seems quite limited and short notice (I've never managed to arrange a booking unfortunately), Alycia4you, Mia Starr and Baylie (I'm hoping to see the last two next time I'm in the UK).