DIRECT BOX OR NOT???

[mrhankey87]

Hi all, I'm stuck between buying a direct box or not.

I own a Presonus Firestudio Mobile http://www.presonus.com/products/Det...x?ProductId=58

check the tech specs, they are awesome in my opinion.

What I don't know is:

should I just plug the guitar into the:
Instrument Input (¼" TRS, Channels 1 & 2)
-Type TS Female Unbalanced
-Input Impedance 1 MΩ

or plug the guitar into a direct box (in my case RADIAL JDV, the best active box around from what I've heard) and then plug the XLR output of the direct box into the:
Microphone Preamp (XLR Balanced)
-Frequency Response (+0, -0.5 dB) 20 Hz to 50 kHz
-Frequency Response (+0/-3.0 dB) 20 Hz to 150 kHz
-Input Impedance 1.6 kΩ
-THD + N (unwtd, 1 kHz @ +4 dBu Output, Unity Gain) < 0.008 %
-EIN (unwtd, 55 dB Gain, 150Ω Input, 20 Hz to 22 kHz) –130 dBu
-S/N Ratio
-(Unity Gain, unwtd, Ref = +4 dBu, 20 Hz to 22 kHz) >101 dB
-Common Mode Rejection Ratio (1 kHz, 55 dB Gain) >55 dB
-Gain Control Range (± 1 dB) –10 dB to 70 dB
-Maximum Input level (Unity Gain, 1 kHz@0.5% THD+N) +14 dBu
-Phantom Power (± 2 VDC) +48 VDC

What would be the best option, speaking about quality?
Thank you all.