Thakyou all for your input . I know the Dali's are the "weak link" but what i have failed to mention is that i am also running a REL T5X sub which raises their performance significantly .
I have upgraded from a Orofon Blue MM to the Quintet . I was first using the Blue in a Planar 1 with a Rega phono 2 - i was not impressed with the phono stage in the Rotel pre amp -but maybe that needed "running in "too !
I bought the Project classic with no cartridge fitted . I wanted to try moving coil but both the Rega and the Rotel pre amps dont cater for it. I tried the blue in the Classic before deciding to try the red MC l.It sounded pretty much the same as it did in the Planar1 -bass was better defined but any other differences were slight.
so i will fiddle with the setting on the IFi and see how it sounds after about 30 or so hours of playing.
There is a lot to unpick from your original question and the answers you have given. If I have understood you correctly, the turntable, cartridge and phono amp are all new. Also, you didn't particularly like your old setup. It also sounds like you didn't that one long either, as you are talking about running in again. Is this all correct? If it is, you have no real baseline for comparison. If you liked your new setup it wouldn't be a problem as you don't, you need a new starting point.
Do you still have the old Rega record player and preamp? if you do the first thing to try is the Old record player with the new Ifi to see how that performs. if that sounds muddy, there is your problem, and a better phono amp may do it.
Secondly, you could try the Orofon Blue with you new Pro-Ject record player. You can try that with both phot amps, and the inbuilt one in your amp. If you don't still have the old kit, you probably need to buy another cartridge to see how that performs.
Despite being expensive, the Ortofon Quintet Red is an entry level in the world of MC, so you are probably going to have to get closer to the £1,000 mark before you start getting a noticeable difference over a £200 MM.
Good luck, i sure you will get there inn the end.