I ordered yeh lai siang last year during christmas through their website. Their packages quite cheap and food taste quite okay. Wanted to order again this year but their website down.
This year maybe order from neo gardens cuz I only have their flyers left at my doors. lol. But abit over my budget.
Found this link at singaporemotherhoods.com: http://www.singaporemotherhood.com/forumboard/messages/2495852/2910172.html?1253635338
Apparently, Yeh Lai Siang is pretty good. Someone go tell Yeh Lai Siang that their website is down! Hahaha.
Neo gardens is confirmed good, look at so many people loving it: http://sgforums.com/forums/3488/topics/382409
Lyco, if you are concerned about budget, you might want to look at FoodLine.sg. - http://www.foodline.sg/. They allow you to compare packages' budget across several caterers. Must check this out.
Found their contact from the cached copy of google..
Tel: (65) 6744 2826 / (65) 6743 1067
You can try calling them. lol. But I think order from other caterers better, try something different every year.