Large garden office - whats best, wooden or composite/modular construction?

Question

I'm looking at putting in a large garden office, probably 4m x 6m or 4m x 7m and have pretty much narrowed it down to two types...

Ones a wooden one like this :

http://www.weatherstrong.co.uk/newengland.asp

(big pic : http://www.weatherstrong.co.uk/images/newengland/retreat_main.jpg )

The other is an insulated type like this :

http://www.insulatedbuildings.co.uk/eco_ranges.shtml

(the wooden effect one, but much bigger)

Firstly, has anyone had any experience with products from these suppliers?

One of my main concerns is security, i run a mail order business from home and this will be my office, stockroom and packing room so it needs to be secure.

The wooden one can have double glazed (wooden) windows and a wooden door but the modular one has upvc dg windows and multipoint locking doors, and i think would be more secure, but not sure?

The wooden one will give some mezanine storage area due to its height and the insulated one is better insulated and sound proofed but just on one level.

Has anyone got any experience of buildings like this, in comparison to each other?

Anyone confirm if the modular one is going to be more secure?

I have some extremely heavy metal cabinets to go in there, the wooden building people say they can put extra supports in under the floor, but the modular people say no problem, as they have customers using same types for freezer and cold room storage.

Prices are roughly similar although wooden slightly more.

Sorry for squeezing more than one question in here lol!

All comments welcome

Cheers

Jim

Answer 1

Wood, and lots of it.

Answer 2

The first one would be ridiculously more expensive than the second.Either would be fine for you purpose.They both could be effectively made secure.If your in Britain than the first might need planning permission.Your neigbours will not be happy with you as they are very large.The wood one is beautiful,but l would go for modular as they are able to flex if base moves or soil erosion.Modular requires less maintenence and is more durable and more difficult for breaking into (all are marginal though)

Answer 3

A conservatory sounds better.