If you are not committed yet, save up your money and get a tent that is at least 1.8m/6 foot tall, the tent you are contemplating is really only suitable as a clone "nursery". A 1.2 x 1.2 x 1.8 would be a more suitable plant growing sized tent.
Combined with a TS 1000 and your life as a grower will be much happier.
If you are already awaiting the arrival of the 2 x 2, then the TS 600 would probably be better for that space and controlling heat, but I would still purchase a TS 1000 for being a better all round light, plus you will have a good light for your next tent.
The TS 600 is only rated at 100 watts, barely enough, but the TS 1000 while only being rated at 150 watts, would provide superior results.