17mm T4 for me. If I only had one eyepiece it would be that one - and I use it 80% of the time. Fabulous in the 20".
I use a 35mm Panoptic for low powers, only because it's a more reasonable size than the 31mm Nagler - but a paracorr is a must to flatten the field (I think a paracor is a must on any f5).
Back to your question - Keep the panny and buy a paracorr
