[hammer4reel]

if on that tight of a budget either wait until you can afford a bigger screen.
take a ride to cabelas, and look for NEW units being discounted on close outs. many times you can get them at an even lower price.
Just need to ask the salesman IF that price is the bottom line.

Only bad thing about that is EVERY electronics manufactures new units wont talk to older units. and if you want to add something at a later date you may have to make major changes.

Buying a current new model should allow you to upgrade for about 3 years