Hello Charlotte. :)
Whenever possible, the system runs better if your monitor resolution matches your FS9 resolution (better performance). My system runs an Invidia GeForce 650 graphics card. My native resolution is 1920x1200 pixels, which is what I have my FS9 resolution set to also.
As far as the gauges being clear, there is a tweak you can do which makes them easier to read and much more clearly detailed. It involves editing the aircraft's panel cfg.file. Most planes are defaulted to 256,256 or 512,512 on the gauge pixel resolutions. You can manually edit the entries to say 1024,1024... this will make the face of each instrument dial VERY clear and easier to read.
This is an example from the default Microsoft Cessna 172 panel.cfg file in FS2004. The stock gauge pixels are only 512,512. We need to change them to read 1024,1024.
Open the panel.cfg file using the microsoft text editor called "Notepad" then scroll down until you find the [VCockpit01] grouping. Change the text entries and the SAVE the panel.cfg file.
[VCockpit01]
size_mm=512,512
pixel_size=512,512
texture=$C172s_1
background_color=0,0,0
gauge00=Bendix_King_Radio!Bendix-King Radio Nav-Comm 1, 0, 0, 205, 77
gauge01=Bendix_King_Radio!Bendix-King Radio Nav-Comm 2, 206, 0, 205, 77
gauge02=Cessna172!Clock, 413, 1, 93, 93
gauge03=Bendix_King_Radio!Bendix-King Radio DME, 0, 86, 198, 51
gauge04=Bendix_King_Radio!Bendix-King Radio Audio, 201, 85, 198, 34
gauge05=Cessna!Annunciator, 403, 96, 109, 30
gauge06=Bendix_King_Radio!Bendix-King Radio AP, 0, 136, 198, 59
gauge07=Bendix_King_Radio!Bendix-King Radio Xpndr, 0, 196, 198, 61
gauge08=Cessna182s!VOR2, 257, 129, 126, 126
gauge09=Cessna!ADF, 385, 130, 126, 126
gauge10=Cessna!VOR1, 1, 258, 126, 126
gauge11=Cessna!Vertical_Speed, 129, 256, 126, 126
gauge12=Cessna172!Airspeed, 256, 256, 128, 128
gauge13=Cessna!Turn_Indicator, 384, 256, 128, 128
gauge14=Cessna!Altimeter, 1, 383, 126, 126
gauge15=Cessna172!Tachometer, 128, 383, 128, 128
gauge16=Cessna!Heading_Indicator, 256, 384, 128, 128
gauge17=Cessna!Attitude, 383, 384, 128, 128
gauge18=shockwave_lights!SW Lights, 1,1,1,1 //shockwave light
[VCockpit02]
file=Cessna_172_Panel_Decals.bmp
size_mm=512,512
pixel_size=512,512
texture=$C172s_2
background_color=0,0,0
gauge00=Cessna182s!Oil_Press_Temp, 257, 2, 98, 98
gauge01=Cessna!Vacuum_Ampermeter, 256, 102, 98, 98
gauge02=Cessna172!Fuel, 356, 2, 98, 98
gauge03=Cessna172!EGT_Fuel_Flow, 356, 102, 98, 98
gauge04=Bendix_King_Radio!Bendix-King Radio ADF, 261, 201, 214, 54
gauge05=Magnetic_Compass!Magnetic-Compass,455, 0, 57, 57
gauge06=Cessna!OMI_Lights, 461, 61, 47, 19
gauge07=Cessna!Pitch_Trim, 461, 85, 44, 74
gauge08=Cessna!IOAT, 457, 173, 54, 18
I hope this is helpful. I've attached (2) screenshots that show the differences this editing can make in an airplane.
Best Wishes! ~Glenn
Default _ BLURRY Gauges ...original 512,512 pixels
Default _ CLEAR. Changed the pixels to read 1024,1024