6-7 metre whip often does the damage in the witham matches these days, bit tricky to master though for a novice.
I know from your previous postings Jim that you like to fish Tattershall. I like to pole fish there, I generaly fish a line about 7-8 metres out, just at the bottom of the nearside shelf with the pole at 9.5-11 metres with a long line of about 6 metres so you can almost run through right down to the end of the peg. You do need a fairly good pole though for this to be comfortable but if you can strech your budget to 200 youd get one that will be ok.
No. 6 elastic, 2.6 bayer mainline & 1.7 bottom should be ok to get most fish out you are likely to encounter.
Good floats for this style are the drennan Turbo say 0.75g with not much flow, up to 1.5/2g in winter with flow.
Jim, if you fill in your profile/activate your email I'll gladly give you a shout and have a day at Tatt's with you later on in the season, I like to get down there October onwards when the weed has died off a bit and the roach are shoaled up round the bridges.