In reply to SamStrong93:
Ditto re shape being more important.
Some people do get hung up on rubber if you are doing very hard grit slabs for example but, even then, I am sure it is very marginal. At one point a lot of grit climbers (incl myself) were obsessed about 5-10 stealth rubber but that no longer seems to be the case.
I've been using La Sportiva's for years now and the rubber is very good. I've gravitated towards miuras for most of my climbing outside - the toe is great for pockets, very precise, and it's rigid enough for edges without being rubbish on slabs. However, I think a lot of people can't tolerate the shape of miuras. Katana velcros are a less rigid, wider, take on it which suits slabs a bit better probably although you can also get Katana lace-ups.
Personally I don't bother with a very comfy all day trad shoe as I can merrily wear miuras and various other lace-ups most of the day unless it gets very hot (in which case a velcro is probably better anyway so you can slip it off between pitches easily).
I'd really try a number of them to see what your foot shape suits best. You may well find lace-ups will suit if you have a narrow foot but velcros if not. However, I can and do wear both fairly successfully.
Post edited at 17:40