Early 2000s Sony Vaio - Upgrade

I got this Sony PC from an estate sale and completed all the big upgrades. The CPU, RAM, GPU, all "new" and a 64gb SSD with a clean install of Windows XP SP3. It runs much better than it has any right considering the OEM specs were total trash. I booted up Quake 3 Arena and runs smooth as silk. It came with a period correct rolling desk, matching Sony KB/M and speakers. The hardware specs may not be huge and the case design limits further hardware upgrades. But it has style and does all I need it to do. Sony PCV-RX550 Motherboard: Asus P4B-LX, Intel 845 chipset CPU: Intel Pentium 4 Northwood 2.2GHz (SL6S8) RAM: 512MB SDRAM GPU: Sapphire Radeon 9600 Pro 256MB AGP with DirectX 9 Storage: Silicon Power 64GB PATA SSD PSU: Sony OEM 280W Monitor: Sony HMD-A200 CRT OS: Windows XP Home SP3