You're welcome!
I have not dealt with any of these suppliers myself but so far, we have not received any serious complaints about any of them from other SaleHoo members. But if you want to be sure, though, how about purchasing a sample order first before bulk ordering to see how the supplier really is to work with and whether they are value for your money?
You can also search the forum for the supplier's website/company name and see what other members have to say.
All the best!