I recently did a tv mod and upgraded to a 40" tv. While not the same mod as yours - most any tv you select will have the same basic inputs/outputs. Should be plug and play. As long as you make a note of what went where.
In shopping I found going to the manufacturers website usually provided more detail than the store websites. Most of them will even have the product manual available for viewing.
Some of the things I was careful about were current technology and overall weight. I went with another Sony Bravia only because it fit my needs and walmart had it on sale online. I like it a lot but in my haste did not realize it lacked bluetooth capability. So my sony bluetooth headphones - which are great - do not work. Irony.
Im not sure of your habits but having a smart tv with wi-fi and bluetooth capability is pretty handy. Wi-fi can stream movies, iTunes, etc. Bluetooth is nice for the wireless headphones - awesome sound and much simpler then trying to wire in a sound system.
Have fun with it and enjoy the upgrade!