My advice;
1) Avoid cheap places that just deliver tyres and then you have to get them fitted yourself... finding the someone to fit them yourself is a PITA and they charge you a tenner a wheel minimum, plus the old tyre disposal, plus nitrogen gas etc., so you have to add about £60 to the price for 4 tyres.
Just Google "buy cheap tyres in <where you live>". If you're buying 4 you can get decent discounts that will work out cheaper, incl. fitting.
2) Look at all the tyres in your price range. Choose the one with the sexiest tread pattern.
There is no real difference between the different noise and wet weather grip ratings so don't obsess about those. Anything A - C will be cool. The difference between a 69DB and a 71DB noise rating falls into "you won't notice" so again, don't pay extra.
3) 500 only needs a T-rated tyre, so don't spend extra on H-rated... although not every H-rated is more expensive than every T-rated tyre. Just look at the price, not the speed rating.
4) Similarly an XL tyre is not needed. They tend to cost about a fiver more and make the ride slightly firmer. If you always lug around 4 people plus a dead body in the boot OR your local roads look like a bomb-site then XL might be better since they have a stiffer sidewall and will be more resistant to sidewall damage.
- Goodyear Efficient grip (A-B rated) are the best wet weather tyres I've used personally... but their prices have gone a bit bonkers lately. You might find a good deal locally though.
- I currently have Bridgestone T005 (C-B rated) and they're fine, though again, prices are creeping up.
- Avon ZT-7 seem to be available in a mid-£60s price bracket and even though they're "only" D-B rated, I had them before on my old Alfa '45 and they were phenomenal (albeit replacing a mixed set of Ling-Long, Nankang, Lifejoy and Nicky-nacky-noo).
Ralf S.
Db is measured on a logarithmic scale so the difference between 69Db and 71Db is significant. A 3 Db increase represents an apparent doubling of noise level. It may be an important factor for some.
Choose the sexiest tread pattern is simply an odd statement - there are real and measurable differences between tyres.