Anti-clockwise takes you with the flow of the Soar, which is probably an advantage.
When we did it a couple of years ago (starting from Warwick), we thought it was a bit short for a fortnight. So rather that turning down the Coventry Canal at Fradley we carried on along the T&M to Great Haywood, then went through the Tixall Wide, up the Wolverhampton 21, through Birmingham, and back via Lapworth and Hatton.
Depends how energetic you want the trip to be, but there are always extensions or side trips to add on if you want.