Personally I didn't like the last AquaOne I used although that was 2 or 3 years a go so things may have changed. I would suggest a Tetratec EX1200. Maybe a tad over budget, but I love mine Mine was Â£85 when I got it, but I seem to remember the price may have gone up since.
Nice one, that's a good price. I'm using one on my 4 foot/120l Pufferfish tank. They're good, solid, powerful filters.
I used a JBL Cristal Profi for a client tank I set up because I got a good deal from JohnAllan, but I wished I hadn't in the end. I found priming it very difficult and ended up having to suck on the pipes to get it going.
I am pleased to hear these are good filters. Have been trying to find somebody using one for ages and gave up in the end.
I have just bought the e 900 to go with a Fluval 305 in a 240L tank. The sizes seemed to match so flow rates should be similar.
It should arrive tomorrow. Just under 86 quid.