The D series has the B's refinement in a lighter reel. The Chronarch 50/51mg is also a classic.
Either the D or B will overall be the best, while the A/SF models and the D are the lightest outside of the 50mg (which really I'd consider a side series overall to the chornarch).
The Chronarch E is just meh compared to the B or D models, but it's also priced that way.
The Chronarch A is nice, but it sits higher on a rod than the D or B, doesn't cast as well, and the drag and gearing is a bit less powerful.
A Chronarch B at around $150 and the Chronarch D at $200 on the secondary market are your best bets for bang for buck IMO.