I would like to see a sysinfo built in into KVIrc to get something like:
OS: Windows 7 Ultimate Edition (Version 6.1 Build 7600) , CPU: 4 x Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GHz @ 2500 MHz 3072 kb Cache, MEM: 4094MB, 45% free, DISKS: total 698 Gb, 251 Gb free, GFX: NVIDIA GeForce GTS 250 512 MB, SCREEN: SyncMaster 245B/245BW/245BPlus(Digital), 1920 x 1200 @ 32 bit, AUDIO: Realtek High Definition Audio, Tunebite High-Speed Dubbing, UPTIME: 0 d, 1 h, 40 m
Other then that, KVIrc seems to be perfect for me (just switched from HydraIRC and Vortec IRC to KVIrc, because of missing UTF-8 support and other stuff).