I wouldnt be going for featured items other then pad - they just need to add paint here cant screw that up.
Mouse - price is quite good value indicator - and for D3 one they need to pay rights and stuff + they know it will be sold on hype bandwagon and its not gonna be tightly tested. So chances are good its gonna be of lower quality then mouse of same price - remember its not something you will see directly after buying it but after prolonged use. Obviously jumping from cheap mouse will give you blast no matter what you buy.
Also remember to get right mouse for your grip type.