Which R4 3DS is the best support the 3ds v7.1.0-16 and where to buy?

This is a very hot topic in GBA Forum, many users shared their view openly,some users recommend r4i gold rts 3ds, they thought r4i gold 3ds uses famous wood firmware,with a quicker updating, and at present,this card is the most famous 3ds card in the market.While other users recommend r4i sdhc rts 3ds,they said,r4isdhc 3ds rts is the newest card from  r4i-sdhc.com and r4i-sdhc team is a old brand and trustworthy and so on. In all,different people with different views.
At present, the popular r4 3ds card is r4i gold rts 3ds and r4isdhc 3ds . In fact, there exist mini difference between these two cards, if you need,you can read this thread The Comparison between R4i-gold rts 3ds and R4isdhc rts 3ds to know more clearly about these two cards.
Then which R4 3DS is the best support the 3ds v7.1.0-16 and where to buy? If have to choose  one , then i choose r4i gold rts 3ds . It uses famous wood firmware,with a quicker firmware updating . Most important, r4i gold rts 3ds with a good technology supporting and this card was always the first one to fight back about the nintendo firmware updating.Now, r4i gold 3ds added rts function as well.And you can buy R4i gold RTS 3DS Card here : buy R4i gold RTS 3DS
R4isdhc 3ds rts card is a amazing card as well, it supports rts,rtg function too. It’s the best r4isdhc card.If you are interested in this card,you can buy it here :  buy r4i-sdhc rts 3ds