In reply to robdan:
lets try another angle, synthetics tend to smell, even if your feet don't.
So scarpa and sportiva are non pongy, evolve and 5.10 tend to pong.
My evolves are so bad i daren't use them on still days outside. generalisation I know.
Might be teaching you to suck eggs, but here's some other thoughts, discount if you know it already.
If you're planing on going out lots, buy more than one pair. there are many approaches.eg
1) buy a new pair as the old ones get comfy. You can then wear in the new ones, wear the comfy ones for pushing yourself and the old close to worn out ones for down the wall and warming up in.
2) Buy 2 (or more) pairs. One ubber cheap basically disposable pair that fit OK without much pain etc. (eg red chilli corona, bargin scarpas, evolves). These you use for beating up down the wall, on long multipitch (as they are comfy) and low grade routes & mileage. They work well in font too. The second pair is your "good" pair for those harder ascents, the tighter fitting, expensive "tech" pair. Some add a down toe pair to this list for overhanging/sport type climbs.
The third option is to stop worrying about shoes, get some that fit and suit you and just stump up the cash when you need a new pair.
I've only recently noticed much difference in shoes/ shoe types. Most of the time they still don't matter, except in my mind when tying on.
Personnally:
i'm a slip on or velco fan 'cos I'm lazy.
I like scarpas and sportiva.
5.10 can be tight on my achilles tendon & smell.
Red chilli & mad rock don't seem as sensitive or robust.
Evlove are OK, but smell & very soft - but makes them comfy.
As a final point, Go outdoors are having a climbing sale on the 4th. 50% off rrp.
happy climbing. Kev