I would recommend you try IFI's new power supply with your Ifi Iphono. I had the Iphono2 and it is quite a bit better then the original. Really hard to beat for anything less then $1000. The new power supply is not very expensive well under $100 and worth trying. Also I've read good results with pairing it with their Tube stage buffer. now that said...
If your going to spend $2k I'd highly recommend you read the review I wrote last week here when I compared the Gold Note ph10 ( $1500ish)Audionote Kit ( $2000) and the Allnic 1202 ($3800). I would also like to add in these the Manley Chinook as another excellent option in that price range.
I own the PH10 and its a wonderful Phono stage and for the money one of the best I've heard for under $2k. I'd also say the AudioNote kit phono stages (there is three) are surprisingly wonderful sounding.