Problem...

I hear great final mix (analog) but when I record that thru RME converters (Multiface) it doesn't sound that good anymore.

I recorded in 24bit resolution, 44.1.
Details are lost, highs are muddy, bass not tight. Something is wrong. OK, it is not SO wrong (most people probably would not notice it) but I do and it bothers me.

I don't remember having that sort of problems when I used to record to DAT (Tascam da-20 mk2). DAT recording was usually a little bit lighter on bass than original but the highs and details were OK. And it was only 16bit resolution.

Now here comes an idea...
I can get my ex-DAT back really cheap (cheaper than any good AD converter). Tascam DA-20mk2 has an option to work only as ADDA converter and I can connect it to my RME S/PDIF i/o.

Do you think that Tascam would sound better than RME multiface or do I just have wrong memory about quality of Tascam converters?

If Tascam converters aren't any better, which 2 ch ADDA converter do you recommend as an upgrade from RME multiface... Budget IS an issue :(

Thanks

p.s. No, I do not have a chance to audition both units. this is why I need your opinion...