I started with the typical 55 but moved on. You will fight yourself for spending the money on the smaller system.
You will not be as limited, but if space is an issue than smaller would be better.
If it is money be patient and look in the paper. The other month someone posted about a 200g with everything but good lighting and an umm not so good skimmer but I fight myself for not having the room. The price was 500 dollars, selling because baby is on the way. The live rock for that system cost more than he was asking..