I'm sorry but your link is not working, pls post normal link from rapid.
1) Ye A110 do not have VGA output (neither kaiboer) but u can choose VGA resolution from menu. So there could be some problems with 1920x1200 and other resolutions if u running it with PC monitor.
2) I have 1920x1200, it works but i think its little bit streched, so i wanna try to find way to have DTS + VGA output
3) i think there is nothing else
EDIT: i'm not sure bcs i;m not using 5.1 but maybe there is also problem with it. But when u have 5.1 its probably best way to buy a real Receiver.
Pls if u can, post me that RS link immediately. Tnx a lot