Thank you both, I may add HC, I'm a little unsure, might use Glosso instead as I feel it'd fit better with the scape, when I upgrade the lighting, which should be this weekend, I'll probably suspend it from the wall as it's more convenient, I think I'll go for a 24W T5, then if I do have any issues I can just raise the height of the lighting to suit my needs, I'm also tempted to add some H.polysperma to the rear right hand corner to conceal the filter intake, diffuser (even though it looks cool) and the heater, I could bung the heater on the other side but I'd have wires trailing everywhere.
Thanks.