It's a perennial question - best boots etc. I use either some decent lined Aigle wellies as they are comfy and keep low crawling bugs at bay and are fine for up to 3 hours. Easy to clean oomsk off when you've gralloched and easy to take on an off. On the other hand, for longer days I've currently settled on some Aku Pilgrims. They issue these to some of the armed forces it seems and so you can always find a cheap pair on ebay being sold perhaps by someone who has reported them 'lost'!!

I paid £55 for my gortex lined ones about 18 months ago and they are still in excellent condition.
I've got 2 pairs of the Aku's - one gortex lined for winter and one non gortex for summer. I also them for through hiking around the UK and for days buggering about on Exmoor and Dartmoor and they are just great. Very comfortable straight out of the box - in fact so much so that I though there must be something wrong.
I've had expensive boots over the last 30 years for hiking and latterly stalking and the last pair of Hanwags I sold on for a huge loss as I just found them heavy and stiff. If you visit any through hiking forums it's a well debated subject there too! Personally nothing too heavy, and I think your ankles and feet need to be flexible. I've found the tall lace up boots to be far too restrictive and heavy and they simply don't allow your legs and things on the end to flex and move like they were engineered to do. This is only my opinion though!