Bought this to replace my current seat toledo itech, similar spec but the octavia has more toys. The 1.6 tdi feels a little slower but it's a slightly heavier car and I think they've deliberately made the octavia a more progressive power being a higher class of car?

So out with this and soon in with the new one,

You could compare new Toledo to Rapid. If you put Octavia in the mix, answer is rather simple.

I love my toledo and think they're brilliant cars, handle great and go well for what they are but the seats aren't the comfiest. That's my only real gripe about it tbh. But with my right knee getting worse I need something a bit bigger

Don't forget then about Superb Mk3 or even Mk2. Even more space and you can find decent deals (at least on my local market).

Yeah I did fancy a superb but they're still outwith my budget so at least this has enough space for me and comfier seats as well.