Need details of RAM type and frequency for upgrading laptop

I have a HP Pavillion G6 notebook laptop with processor as Intel(R) i3-2350M CPU @ 2.30GHz, 2300 Mhz, 2 Core. I have 2 RAM slots, only one inserted with a ADATA 2GB (1RX8 PC3-10600S-999) RAM stick. I need to upgrade it to a total of 8gb RAM. What specifications of RAM do I need to buy? Is it better to buy two 4 gb RAM or one 8 gb RAM for faster performance?

Also I need to upgrade the old 500 gb SATA 9.5mm hdd to sdd. What capacity and brand sdd would be best for basic PC operation with sometime media play?