I'd recommend Vibe as well mate, very good bits of kit. I have one of their active subs in my inferno 225. I bought some Fli ones once and the terminals were so feeble they broke as soon as you tried to push a crimp onto them. They're a cheaper brand by Vibe I believe but I wouldn't recommend them as by comparison they're not made as well. From Halfords though you'd be good off with Vibe but I have also used Pioneer and Alpine speakers from them over the years and all have been a good upgrade to OEM ones.
I currently have Pioneer speakers all round but I'm sure this is normal?! Being a Lux? Either way Pioneer have some good speakers also...
Cheers lads. They have some vibe ones in at 34.99 13cm is correct yes? They say slim fitting aswell so might try see if they slide in the front...
these are useful aswell saves cutting anything http://www.ebay.co.uk/itm/Speaker-A...7?pt=UK_In_Car_Technology&hash=item3cbc6ffdeb