I have used 2Checkout and paypal alot. Both work OK, but I need something for UK/Ireland credit card payments. I'm not too happy with 2Checkout as it is more US based. I've been looking at sagepay. Anyone have any good integration solutions advice?
Another solution for a shopping cart that I'm trailing at the moment is interspire which is a software as a solution service (saas) i.e everything is hosted on interspire so no worries about updates, backups etc. It's an American solution so it may not support Irish payment gateways, but a very impressive solution all the same.