IG Spread Betting Forex UK

Not sure whether to use IG or OANDA. Being from the UK and having a smallish account of £10k I think spread betting would suit because of it’s tax advantages. I find it interesting that IG offer better spreads on there own system rather then using MT4 - I’m guessing due to the advantages of EA’s on MT4. I am going to be a position trader looking at only trading once or twice on any single pair a month. Looking to be making and not losing anymore than 300 pips a trade so spreads aren’t the biggest factor.

What’s peoples thoughts? With a small volume of trades looking for pip wins of over 100 is there a better option out there?